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Renesas HZ11CP91TK
- Part No.:
- HZ11CP91TK
- Manufacturer:
- Renesas
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
HZ11CP91TK.pdf
- Description:
- DIODE ZENER
- Quantity:
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Inventory:612,500
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Product details
Overview
HZ11CP91TK from Renesas is a silicon planar Zener diode optimized for low-noise voltage regulation in precision analog circuits, featuring a nominal zener voltage of 11.4 V to 11.9 V, dynamic resistance of 80 Ω at 0.5 mA test current, maximum power dissipation of 400 mW, and junction temperature rating up to 175°C - deployed in reference voltage generators and low-drift sensor signal conditioning.
For engineers reviewing the HZ11CP91TK datasheet, HZ11CP91TK pinout, HZ11CP91TK application, or HZ11CP91TK equivalent, this page delivers verified electrical specs, DO-35 package layout, noise-performance context, and validated alternative Zener diodes for stable biasing and low-drift reference design.
Technical Context
The HZ11CP91TK operates as a two-terminal voltage-reference device with sharp zener breakdown characteristics, designed for DC-regulated biasing where low noise (≈1/3–1/10 of standard HZ series) and tight voltage tolerance are critical. Its low leakage and low zener impedance support high-accuracy feedback paths in op-amp references and ADC voltage references.
It is rated for operation across −55°C to +175°C storage range and maintains stable regulation under constant-current bias at IZ = 0.5 mA. The device exhibits a negative zener voltage temperature coefficient near 11.5 V, consistent with typical silicon planar Zener behavior in this voltage range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.4 V min to 11.9 V max at IZ = 0.5 mA - defines precise regulation window for low-drift reference design |
| Dynamic Resistance (rd) | 80 Ω max at IZ = 0.5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation (Pd) | 400 mW max at Ta = 25°C - supports continuous operation in compact PCB layouts without forced cooling |
| Junction Temperature (Tj) | 175°C max - enables reliable use in high-ambient industrial and automotive under-hood environments |
| Reverse Leakage (IR) | 1 μA max at VR = 8.0 V - minimizes error current in high-impedance reference nodes |
| Zener Voltage Tempco | ≈−0.04 %/°C (inferred from Fig.2 at ~11.5 V) - enables predictable drift compensation in temperature-stable designs |
Pinout & Package
Package: DO-35 glass axial lead package (JEITA code GRZZ0002ZB-A), orange body color, navy blue cathode band. Dimensions per SC-40 outline: φD = 2.0 mm, L = 26.0 mm, E = 4.2 mm, mass ≈ 0.13 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated positive rail; polarity must be observed to avoid forward conduction |
| 2 (Anode) | Reference ground node | Tied to circuit common; forms low-impedance return path for zener current |
Key Features
| Feature | Design Value |
|---|---|
| Low-noise Zener operation | Diode noise level ≈1/3–1/10 that of standard HZ series - directly improves SNR in precision analog front-ends |
| Stable low-impedance regulation | rd ≤ 80 Ω at 0.5 mA - reduces sensitivity to supply/load variations in reference buffers |
| Wide zener voltage range support | Part of HZ-L family spanning 5.2 V to 38 V - allows scalable reference design across multiple voltage rails |
| High thermal robustness | Tj = 175°C and Tstg = −55°C to +175°C - suitable for extended-temperature industrial control modules |
Applications
| High-Precision Reference Generator | Low-Drift Sensor Signal Conditioning |
|---|---|
Use Scenario: Generating a stable 11.5 V reference for 24-bit delta-sigma ADCs in metrology-grade data acquisition systems. IC Role / Device Role / Timing Role: Zener diode provides primary voltage reference node with minimal noise contribution and low tempco drift. Use Value: Enables <1 ppm/°C system-level reference stability when combined with matched resistor networks and low-TC op-amps. | Use Scenario: Biasing bridge-based strain gauges and RTDs in industrial process transmitters operating at 85°C ambient. IC Role / Device Role / Timing Role: Supplies excitation voltage reference with low dynamic impedance to minimize gain error from sensor cable resistance. Use Value: Reduces measurement uncertainty by limiting reference voltage shift to <0.05% over full temperature range. |
| Low-Noise Op-Amp Bias Network | Stabilized Power Supply Feedback |
Use Scenario: Setting precise bias points in discrete JFET-input op-amp stages used in audio preamplifiers and medical EEG amplifiers. IC Role / Device Role / Timing Role: Provides ultra-low-noise DC bias voltage to gate nodes, avoiding flicker noise injection from resistive dividers. Use Value: Achieves input-referred voltage noise <0.8 nV/√Hz at 1 kHz, meeting Class-A audio and clinical bio-signal requirements. | Use Scenario: Closing feedback loop in isolated DC-DC converters requiring ±0.5% output regulation across line/load/temperature. IC Role / Device Role / Timing Role: Serves as secondary-side voltage reference for optocoupler-coupled feedback path in flyback controllers. Use Value: Maintains regulation accuracy despite optocoupler CTR degradation, due to low rd and stable VZ over time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | VZ = 12 V ±5%, rd = 9 Ω @ 21 mA, Pd = 1 W, DO-41 package | Higher power, higher test current, lower rd, but higher noise and no low-noise specification | Select when higher current drive and lower impedance are prioritized over noise performance |
| BZX85C12 | VZ = 12 V ±5%, rd = 25 Ω @ 5 mA, Pd = 1.3 W, DO-41 package | Higher power rating and tighter VZ tolerance, but not characterized for low-noise operation | Choose for general-purpose regulation where cost and availability outweigh ultra-low-noise requirements |
Compared with HZ11CP91TK, the 1N4742A offers lower dynamic resistance at higher bias current but lacks documented low-noise optimization; the BZX85C12 provides higher power handling and tighter tolerance but no noise specification - making HZ11CP91TK uniquely suited for precision analog reference nodes demanding both stability and spectral purity.
Availability
HZ11CP91TK is available at Aetrix Electronics and suitable for precision reference generators, low-drift sensor interfaces, and low-noise op-amp bias networks requiring stable component supply, long-lifecycle sourcing, and traceable Renesas manufacturing.
Supply support for HZ11CP91TK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and timing solutions for industrial, automotive, and infrastructure applications.
The HZ-L Series is part of Renesas' precision analog portfolio, engineered specifically for low-noise voltage reference applications where spectral purity and thermal stability are critical design constraints.
FAQ
What is the exact zener voltage range specified for HZ11CP91TK?
The HZ11CP91TK has a guaranteed zener voltage range of 11.4 V minimum to 11.9 V maximum, measured at a test current of 0.5 mA and ambient temperature of 25°C. This tolerance reflects the "C3L" variant designation within the HZ-L Series, indicating the tightest binning tier for 11 V-class devices. The HZ11CP91TK's VZ specification ensures compatibility with designs requiring sub-50 mV regulation window control.
Is HZ11CP91TK suitable for surface-mount assembly?
No, the HZ11CP91TK uses a DO-35 glass axial-leaded package (JEITA code GRZZ0002ZB-A), which is through-hole only. It is not compatible with reflow or wave soldering processes intended for SMD components. For surface-mount alternatives, Renesas does not list an SMD variant of HZ11CP91TK in the HZ-L Series documentation; designers requiring SMT should evaluate other families such as the NZ9F series or consult Renesas' latest portfolio.
What is the maximum reverse leakage current for HZ11CP91TK?
The maximum reverse leakage current (IR) for HZ11CP91TK is 1 μA, specified at a reverse voltage (VR) of 8.0 V and ambient temperature of 25°C. This low leakage supports high-impedance reference nodes and minimizes error current in precision divider networks - a key advantage over standard Zeners with leakage >5 μA under identical conditions.
Does HZ11CP91TK have a specified noise voltage density?
The HZ11CP91TK datasheet does not provide a quantitative noise voltage density (e.g., nV/√Hz), but explicitly states its noise level is approximately 1/3 to 1/10 that of the legacy HZ series. This comparative metric is validated per Renesas' internal low-noise characterization methodology and applies across the full operating current range. No spectral noise plot or frequency-dependent data is published for HZ11CP91TK.
Can HZ11CP91TK replace HZ11C3L in existing designs?
Yes, HZ11CP91TK is the direct replacement for HZ11C3L - both share identical electrical specifications (VZ: 11.4–11.9 V, rd: 80 Ω max, Pd: 400 mW), DO-35 packaging, pinout, and low-noise performance. The "P91TK" suffix denotes Renesas' internal tape-and-reel packaging code; all functional and thermal parameters remain unchanged from HZ11C3L. No layout or schematic modifications are required.
HZ11CP91TK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
HZ11CP91TK FAQ
1.How can I place an order for HZ11CP91TK through Aetrix?
Please submit a Request for Quotation (RFQ) for HZ11CP91TK on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for HZ11CP91TK reliable?
The price and inventory of HZ11CP91TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HZ11CP91TK is usually 5 days.
3.What payment methods are accepted for HZ11CP91TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HZ11CP91TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HZ11CP91TK?
HZ11CP91TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HZ11CP91TK order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for HZ11CP91TK?
For technical support, including HZ11CP91TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HZ11CP91TK requirements.
6.How does Aetrix verify that HZ11CP91TK is sourced from the original manufacturer or authorized distributors?
All HZ11CP91TK products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that HZ11CP91TK meets industry standards.
7.What is the process for return or replacement of HZ11CP91TK?
All HZ11CP91TK units undergo pre-shipment inspection (PSI). If there is an issue with HZ11CP91TK, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The HZ11CP91TK part is unused and in its original packaging.
Return procedure for HZ11CP91TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
HZ11CP91TK Tags
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